Frank Sinatra Jr, the only son of the iconic singer and actor, has died at age 72 from cardiac arrest. A consummate performer who was described by the Washington Post as the "Keeper of his father's flame", was on tour when he fell ill. Sinatra Jr.'s story is not dissimilar to that of other children of legendary entertainers in that his last name opened certain doors and helped him establish a career but also posed challenges in terms of his ability to establish an identity of his own. Sinatra Jr. always had a checkered relationship with his father. While not actually estranged, the young man found his father to be a remote figure who was content to have his son educated in expensive boarding schools. The elder Sinatra never tried to mentor his son or advise him as to what profession to enter. Sinatra Jr. discovered early in life that he also had a gift for singing. In the 1960s he made the decision to follow in his father's footsteps by crooning traditional love songs accompanied by a big band. His father neither encouraged or discouraged that decision. Sinatra Jr. was bucking the trends of the 1960s counter culture, an era in which hard rock music was all the rage among people his age. Yet he never embraced it and in fact denounced rock and roll. Over the decades Sinatra Jr. doggedly worked to establish his own identity- an admittedly difficult task considering he was mostly singing numbers made famous by his father. Sinatra Jr. made headlines in 1963 when he was kidnapped and held for ransom. Ironically, one of his kidnapper's was a friend of his sister Nancy. The situation made international news and involved such disparate figures as Attorney General Robert F. Kennedy, F.B.I. chief J. Edgar Hoover and mob boss Sam Giancana. He was eventually released unharmed and the kidnappers were arrested. In 1988 he was shocked and delighted to be asked by his father to serve as his conductor for his live concerts. Sinatra Jr. indicated that this was the closest he would ever get to his father, traveling and working with him over a period of seven years. The two men were never close but Sinatra Jr. was clearly grateful for the opportunity to work with his father in a professional capacity. After his father's death, Sinatra Jr. resumed his big band concert tours, winning over appreciative audiences. He candidly told the media in 2006 that "I was never a success", pointing out that he never had a hit record or movie. However, he did take satisfaction from performing in front of his own fans and working diligently with his sisters to ensure the Sinatra legacy through official documentaries and books. In that respect he was indeed a success.